Electro-pneumatic action for player piano

Details Electro-pneumatic action for player piano Electro-pneumatic action for player piano

1975-04-28

1976-12-21

Franklin, Lawrence R.

Music

Instruments

Automatic

G10F 506

Patent

active

039981223

ABSTRACT:
The specification discloses a player piano action comprising an electric motor, a roll drive, and vacuum actuated automatic transmission which incorporates a traveling cylindrical housing to operatively engage and disengage the take-up and rewind spools. The action incorporates a pneumatic stack which is constructed to permit access to all bleed holes without disassembly. The vacuum for actuating the notes is supplied via a foot pump which is hinge mounted to facilitate repair of and access to the piano action.

REFERENCES:
patent: 1599394 (1926-09-01), Cheek
patent: 1648840 (1927-11-01), Clark
patent: 1788561 (1931-01-01), Boettcher
patent: 3117481 (1964-01-01), Cushing

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